Police warned the organizations—HRC, he National Gay and Lesbian Task Force, the National Black Justice Coalition and the Gay, Lesbian & Straight Education Network—of a threat against a “national gay rights organization,” GLBT news site Metro Weekly reported.

They got the all-clear around 1 p.m. and were able to return to their buildings.

It’s the first time the Human Rights Campaign, a prominent lobbying group known for its popular equal sign logo, has had to evacuate their offices due to a bomb threat, the site said.

HRC spent nearly $1 million rallying for same-sex marriage in New York and continues to lobby for marriage equality as well as workplace rights, stronger penalties for hate crimes and anti-gay bullying programs.